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thermal relay

A technology of thermal relay and installation box, which is applied in the field of thermal relay, can solve the problems of long time heat transfer, can only be used as overload protection, and thermal relay cannot be short-circuit protection, so as to shorten the reaction time of power on and off and reduce mutual Interfering, sensitivity-enhancing effects

Active Publication Date: 2021-08-31
ANDELI GRP
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  • Description
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Problems solved by technology

In view of the fact that the heat transfer takes a long time during the heating and bending process of the bimetal sheet, therefore, the thermal relay cannot be used as short circuit protection, but only as overload protection

Method used

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specific Embodiment approach

[0027] Specific implementation method: After the load is heated, the metal measuring piece 3 is driven to be heated and deformed. Since the bottom of the metal measuring piece 3 is connected to the fixed connecting plate 15, the metal measuring piece 3 is deformed and drives the fixed connecting plate 15 to slide along the slide rail groove 2 , because the fixed connecting plate 15 is in contact with the conical disc 14, and the conical disc 14 is connected with the telescopic rod 12 at the same time, during the sliding process of the fixed connecting plate 15, the conical disc 14 and the telescopic rod 12 are pushed, and the metal measuring pieces 3 respectively arranged in three groups In between, the heat interference phenomenon of the metal measuring piece 3 is reduced. At the same time, when a group of metal measuring pieces 3 are heated, the metal measuring piece 3 can still push the fixed plate 5 to ensure the working accuracy of the thermal relay. 12 After pushing the f...

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Abstract

The invention discloses a thermal relay, which includes an installation box, a plurality of slide rail grooves are arranged inside the installation box, a metal measuring piece is connected inside the slide rail groove, a push contact piece is connected to the bottom of the metal measuring piece, the Push the end of the contact piece away from the metal measuring piece to be connected with a fixed plate, and one end of the fixed plate is connected with a convex plate, the top of the convex plate is connected with a reset member, and the end of the convex plate away from the fixed plate is provided with a rotating plate, and the rotating plate Both ends are connected with a rotating rod, and the rotating rod is connected with the inner wall of the installation box. The present invention distributes the metal measuring pieces inside three different slide rail grooves, and the three sets of metal measuring pieces are distributed inside different slide rail grooves, reducing the It eliminates the phenomenon of mutual interference of the metal measuring piece under different heating conditions, improves the sensitivity of the thermal relay, and replaces the fulcrum structure by setting a rotating plate structure, which reduces the friction between the curved rod and the fulcrum, and the fulcrum cannot quickly warp the curved rod Phenomenon, shorten the power on and off reaction time.

Description

technical field [0001] The invention relates to the technical field of relays, specifically thermal relays. Background technique [0002] The function of the thermal relay is: it is mainly used to protect the asynchronous motor from overload. Its working principle is that after the overload current passes through the thermal element, the bimetal sheet is heated and bent to push the action mechanism to drive the contact action, thereby disconnecting the motor control circuit. The development realizes the power-off stop of the motor and plays the role of overload protection. In view of the fact that the heat transfer takes a long time during the heating and bending process of the bimetal sheet, therefore, the thermal relay cannot be used as short-circuit protection, but only as overload protection. [0003] The working principle of the existing relay is as follows figure 1 As shown, three groups of sheet metal bodies 32 are wound with electric wires on the outside. A push pl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H61/01H01H61/02
CPCH01H61/01H01H61/02
Inventor 向国庆刘忠陈武奇
Owner ANDELI GRP
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